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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32a376f6058130a5e16a71500cbfec6c2ea9fcacfc7b6ea3ac833c39c3c9e2c5' 
  AND token = 'wxfbipjXi1deejglX554myd1NAx9ptAV/AimJrOig2U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}